Acceptance on physical devices

Run the same scenarios on desktop, iPhone and Android where supported. Keep camera/browser versions, tested backend and assets with each result. For weaker devices, repeat a run with performance="battery" and compare both the render experience and detection reliability.

• Camera. Grant and deny permission, stop, restart, and return from a background tab.
• Images. Acquire both a large and a small marker, tilt it, obscure it and bring it back.
• Interaction. Select a model, drag and pinch while keeping the page controls usable.
• Content. Play an animated GLB and a video, then swap content during the session.
• Spatial. Place on a textured surface, walk around it, lose tracking and try to recover.
• Maps. Save a local optical map, restart and revisit the same viewpoint.
• Capture. Try saving a photo and a recording when the device and browser offer capture.

Record unavailable native features separately from failed tests. The optical backend and WebXR may produce different scale and recovery results. See diagnostics for collecting reproducible evidence.